Edward Wierenga has argued that the free will defense (FWD) is compatible with compatibilism (IFaith and PhilosophyD, April 1988). I maintain that Wierenga is mistaken. I distinguish between the IconceptualD doctrine of compatibilism and the ImetaphysicalD doctrine of soft determinism, and offer arguments that the FWD fails if either doctrine is true. Finally, I reconstruct Wierenga's argument and argue that it fails because either it is equivocal or it contains a false premise